you are seeing the real time 'current' data. This is the same data on the left side of the screen that is displayed when you click on a particular details page and look at the numbers of a particular show.
search-engine based listings, like the 'recently added shows' link as well as the 'other popular shows' link:
pull up the shows (and stat numbers) from the cache, and often are 'old' numbers. I don't know how fast the cache updates itself but sometimes it is a day or two behind the 'actual' real time value. it all works out though as the search engine listings and numbers eventaully get refreshed as times go on, but yeah man, that's the deal!
glad you're digging the archive. tell your friends and tape and / or upload a show or two by a band on the list here.